December weather forecast
Chester, ID

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Weather in December

December, the first month of the winter in Chester, is still a freezing cold month, with temperature in the range of an average high of 26.2°F (-3.2°C) and an average low of 14.2°F (-9.9°C).

Temperature

The month of December sees the lowest average temperatures, reaching 26.2°F (-3.2°C) at the peak and 14.2°F (-9.9°C) at the low.

Humidity

The average relative humidity in December is 88%.

Rainfall

In Chester, during December, the rain falls for 6.6 days and regularly aggregates up to 1.14" (29mm) of precipitation. Throughout the year, there are 97.5 rainfall days, and 11.85" (301mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, September through December. In Chester, during December, snow falls for 17.9 days and regularly aggregates up to 8.82" (224mm) of snow. In Chester, during the entire year, snow falls for 83.8 days and aggregates up to 41.93" (1065mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 0min of daylight.
On the first day of December, sunrise is at 7:41 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 8:00 am and sunset at 4:58 pm MST.

Sunshine

In December, the average sunshine is 4.9h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 1 in December translates into this advice:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.

Frequently asked questions

What time of the year is the coldest?

The coldest temperatures occur during December, when averages reach a peak of 26.2°F (-3.2°C) and a low of 14.2°F (-9.9°C).

How cold is it in Chester in December?

During December, Chester experiences an average high-temperature of 26.2°F (-3.2°C) and a low-temperature of 14.2°F (-9.9°C). In July, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines air temperature and relative humidity, is computed to be 82.4°F (28°C).

What is the average humidity in December?

In Chester, the average relative humidity in December is 88%.

How much does it rain in December?

In Chester, in December, it is raining for 6.6 days, with typically 1.14" (29mm) of accumulated precipitation.

How much does it snow in December?

In December, it is snowing for 17.9 days. Throughout December, 8.82" (224mm) of snow is accumulated.

What is the month with the shortest days?

The month with the shortest days in Chester is December, with an average of 9h and 0min of daylight.

How many hours of daylight does Chester have in December?

The average day length in December is 8h and 58min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:41 am and sunset at 4:49 pm. On the last day of the month, in Chester, sunrise is at 8:00 am and sunset at 4:58 pm MST.

How long on average sun shines in December?

In Chester, the average sunshine duration in December is 4.9h.

What is the month with the lowest UV index?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1.

What is the UV index reading in December?

In December, the average daily maximum UV index is 1. A UV Index estimate of 2, and below, represents a low health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Chester, ID

Average temperature in December - Chester, ID
  • Average high temperature in December: 26.2°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is December (26.2°F).

  • Average low temperature in December: 14.2°F

The month with the highest average low temperature is August (52.5°F).
The coldest month (with the lowest average low temperature) is January (12.4°F).

Average pressure in December
Chester, ID

Average pressure in December - Chester, ID
  • Average pressure in December: 30.26"Hg

The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Chester, ID

Average wind speed in December - Chester, ID
  • Average wind speed in December: 4.3mph

The windiest month (with the highest average wind speed) is June (6.9mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).

Average humidity in December
Chester, ID

Average humidity in December - Chester, ID
  • Average humidity in December: 88%

The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (39%).

Average rainfall in December
Chester, ID

Average rainfall in December - Chester, ID
  • Average rainfall in December: 1.14"

The wettest month (with the highest rainfall) is January (1.5").
The driest month (with the least rainfall) is July (0.28").

Average rainfall days in December
Chester, ID

Average rainfall days in December - Chester, ID
  • Average rainfall days in December: 6.6 days

The month with the highest number of rainy days is April (13 days).
The month with the least rainy days is July (5 days).

Average snowfall in December
Chester, ID

Average snowfall in December - Chester, ID
  • Average snowfall in December: 8.82"

The month with the highest snowfall is January (11.97").
The months with the least snowfall are June, July and August (0").

Average snowfall days in December
Chester, ID

Average snowfall days in December - Chester, ID
  • Average snowfall days in December: 17.9 days

The month with the highest number of snowfall days is January (18.1 days).
The months with the least snowfall days are July and August (0 days).

Average daylight in December /
Average sunshine in December
Chester, ID

Average daylight in December / Average sunshine in December - Chester, ID
  • Average daylight in December: 9h and 0min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in December: 4h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

Average sunshine days in December
Chester, ID

Average sunshine days in December - Chester, ID
  • Average sunshine days in December: 11.7 days

The month with the most sunshine days is July (24.8 days).
The month with the least sunshine days is February (10.6 days).

Average UV index in December
Chester, ID

Average UV index in December - Chester, ID
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).

Average cloud cover in December
Chester, ID

Average cloud cover in December - Chester, ID
  • Average cloud cover in December: 52

The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 11).

Average visibility in December
Chester, ID

Average visibility in December - Chester, ID
  • Average visibility in December: 4mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (3mi).

Chester, Idaho, USA

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